One can wager that the Bais Haknessess Hagdolah (Sanhedrin) did not hold Greek texts to be canon.
The was a religious school at Yavneh (Jamnia). Their teachings form the basis of the Mishna. They wouldn’t have dared tampered with ‘canon’, which has been mentioned does not even mean the same thing to Jews as it does to Christians.
Previous to the 1870s, I believe Christians insisted the Jews changed ‘canon’ at the time of the Masoretes.
Thank you for the info!